objective 1.3b
3
15. Which expression is equivalent to 4i ?
A 12i
B 12i
C 64i
D 64i
16. A circuit has a current of (8 + 7i) amps, and another circuit has a
current of (5 3i) amps. What is the difference between the currents of
the two circuits?
A (3 4i) a

Objective 2.1d
27. Which statement is true for the function f ( x)
A 4 is not in the range of the function.
B 4 is not in the domain of the function.
C -4 is not in the range of the function.
D -4 is not in the domain of the function.
28. What is the doma

51. Which statement best describes these two functions?
f x
g x
x2
x 6
3x 2 3x 5
A They have no common points.
B They have the same x-intercepts.
C The maximum of f(x) is the same as the minimum of g(x).
D The maximum of g(x) is the same as the minimum of

1.
Call x is number of trouble
y is the distance
x = ky
We have
20 = k(400)
k = 0.05
So when he was only 60 miles from home he need
x = 0.05(60) = 3 troubles
3.
50 gallons of water - 4% salt
So we have 2 gallons salt
2/(x + 50) = 1/100
200 = x + 50
150 =